She decided to devote herself______the problem of old age.

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问题 She decided to devote herself______the problem of old age.

选项 A、to study
B、studying
C、to studying
D、study

答案C

解析 本题考查动名词的用法。devote oneself to意思是“致力于,投身于”,此处to是介词,后面接动名词,因此选C。
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